Absorption spectra of a donor impurity in a quantum ring

Abstract

The linear and the third‐order nonlinear optical absorption spectra of a donor impurity confined by a quantum ring are studied using the matrix diagonalization method within the effective‐mass approximation. The linear and the third‐order nonlinear optical absorption coefficients between the ground (L = 0) and the first excited state (L = 1) have been examined based on the computed energies and wavefunctions. The results are presented as a function of the incident photon energy for the different values of the confinement strength, the incident optical density and the ring radius. We found the confinement strength, the incident optical density and the ring radius have a great effect on the linear, the third‐order nonlinear and total absorption spectra. (© 2009 WILEY‐VCH Verlag GmbH & Co. KGaA, Weinheim)

Donor impurity-related linear and nonlinear intraband optical absorption coefficients in quantum ring: effects of applied electric field and hydrostatic pressure

“…To our knowledge, there are only a few research articles related with the effects of impurity and external influences on linear and nonlinear optical properties of QRs [11,19]. The linear and the third-order nonlinear optical absorption spectra of a donor impurity confined within a QR with a parabolic potential have been investigated in [11].…”

Donor impurity-related linear and nonlinear optical absorption coefficients in GaAs/Ga1−xAlxAs concentric double quantum rings

“…Some authors studied the simultaneous effects of hydrogenic donor impurity and external perturbations, such as electric and magnetic fields and hydrostatic pressure, on the linear and nonlinear optical properties of semiconductor nanostructures, particularly in the case of semiconductor quantum dots [8][9][10][11][12][13][14][15][16][17]. There are also some research papers related with the effects of shallow-impurities and external influences on the linear and nonlinear optical properties in QRs [18][19][20]. Xie has investigated the linear and the third-order nonlinear optical absorption spectra of a donor impurity confined within a QR with a parabolic potential [18].…”

“…There are also some research papers related with the effects of shallow-impurities and external influences on the linear and nonlinear optical properties in QRs [18][19][20]. Xie has investigated the linear and the third-order nonlinear optical absorption spectra of a donor impurity confined within a QR with a parabolic potential [18]. The calculation uses a diagonalization method and the compact density matrix approach in the frame of the effective mass approximation.…”

Optical properties of an off-center hydrogenic impurity in a spherical quantum dot with Gaussian potential

“…These features are useful for the development of optoelectronic devices with tunable emission or transmission properties and ultra-narrow spectral linewidths. Hence, nonlinear optical properties of QDs have been investigated both experimentally and theoretically by many authors [6][7][8][9][10][11][12][13][14].…”